#include<stdio.h>
struct Pop
{
	int price = 1;
	int emp;
	int change( int emp)
	{
		return (float)emp / 2;
	}
};
int main()
{
	struct Pop p1;
	int money = 20;
	int num = money / p1.price;
	num += p1.change(num);
	printf("%d\n", num);



	return 0;
}